Vehicular warning device

Abstract

To enable a circuit board mounted with a light source to be disposed along a rear view mirror to achieve downsizing of a vehicular warning device.SOLUTION: A vehicular warning device 1 includes: a circuit board 3 mounted with a light source 2 for radiating light; a housing 5 which has an insertion port 5a into which the circuit board 3 is inserted and which houses the circuit board 3 inserted from the insertion port 5a in a manner that the circuit board 3 is arranged along a rear view mirror; and a pressing member 6 which is provided within the housing 5 to press the circuit board 3 in a thickness direction from the insertion port 5a side.SELECTED DRAWING: Figure 10

Description

[Technical Field]

[0001] The present disclosure relates to a warning device for a vehicle that warns a driver of the approach of a following vehicle, and particularly to a technical field of a structure that is incorporated into a vehicle mirror unit. [Background technology]

[0002] For example, one of the driving assistance functions for automobiles is the blind spot monitoring (hereinafter referred to as BSM) function (see, for example, Patent Documents 1 and 2). BSM is designed to warn the driver that another vehicle traveling in a lane adjacent to the lane in which the vehicle is traveling is approaching the vehicle, and the number of vehicles equipped with this function is increasing.

[0003] The BSM is configured to include a vehicle detection sensor mounted on, for example, the rear bumper, a determination unit that determines whether a vehicle is approaching the vehicle based on an output signal from the sensor, and a display device that turns on or flashes a warning light when the determination unit determines that a vehicle is approaching the vehicle. The display devices are typically incorporated into the left and right door mirrors. The display devices are configured to project light from the rear surface of the mirror and transmit it through a portion of the mirror, thereby illuminating a warning mark on the front surface of the mirror and making the mark visible to the driver. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2020-121575 [Patent Document 2] Japanese Patent Application Laid-Open No. 2002-107518 Summary of the Invention [Problem to be solved by the invention]

[0005] Incidentally, a vehicle warning device is provided with a light source, such as an LED, for generating an indication light, and the light source is mounted on a circuit board. In addition to the light source, the circuit board may also be mounted with a connector for connecting a harness. Therefore, the circuit board becomes large. When the circuit board is incorporated into a vehicle mirror unit, it must be housed in a housing, which also increases the size of the housing. As a result, it becomes difficult to secure space inside the vehicle mirror unit for incorporating the vehicle warning device.

[0006] That is, since the rearview mirror is attached to the visor so that its angle can be adjusted, an adjustment space for ensuring the angle adjustment of the rearview mirror must be secured between the rearview mirror and the visor inside the vehicle mirror unit. In this case, since the vehicle warning device is attached to the backside of the rearview mirror, it is necessary to secure an adjustment space between the rearview mirror and the visor, taking into account the size of the vehicle warning device. This results in a large adjustment space, which in turn makes it difficult to reduce the size of the vehicle mirror unit.

[0007] The present disclosure has been made in consideration of such points, and its purpose is to reduce the size of a vehicle warning device by making it possible to position a circuit board on which a light source is mounted along the rearview mirror. [Means for solving the problem]

[0008] In order to achieve the above object, one aspect of the present disclosure can be based on a vehicle warning device that has a rearview mirror that extends in the vertical and horizontal directions and is incorporated into a mirror unit that is attached to the vehicle.

[0009] The vehicle warning device includes a circuit board mounted on the front side of the rearview mirror and equipped with a light source that emits light when supplied with power; a housing having an insertion opening for inserting the circuit board and accommodating the circuit board inserted through the insertion opening in a position aligned with the rearview mirror; a pressing member provided inside the housing and pressing the circuit board in the thickness direction from the insertion opening side; and a display unit provided in a partial area of ​​the rearview mirror positioned on the rear side of the light source and transmitting light emitted from the light source to the rear side of the vehicle to display a predetermined display.

[0010] According to this configuration, light emitted from the light source is transmitted through the display unit provided in a partial area of ​​the rearview mirror and is emitted toward the rear of the vehicle. When the light passes through the display unit, the display unit appears to be glowing, allowing the driver to recognize the warning.

[0011] The circuit board on which the light source is mounted is housed in the housing in a position aligned with the rearview mirror, so the circuit board does not protrude beyond the rearview mirror, making it possible to make the housing smaller and thinner in the longitudinal direction of the vehicle. Furthermore, the circuit board is stably held inside the housing while being pressed in the thickness direction by a pressing member, thereby suppressing misalignment of the circuit board.

[0012] The circuit board may be housed inside the housing in a position extending in the vertical direction. In this case, the light source may be mounted on an upper portion of the circuit board, and a connector to which a vehicle harness is connected may be mounted on a lower portion of the circuit board. By arranging the pressing member so as to press the lower portion of the circuit board, the pressing member does not block light from the light source.

[0013] The light source can be mounted on the surface of the circuit board facing the rear of the vehicle, and the connector can be mounted on the surface of the circuit board facing the front of the vehicle, which is the surface opposite the light source. In this case, the pressing member can be arranged to press the surface of the circuit board facing the rear of the vehicle. This allows the pressing member to press the surface opposite the connector at a portion away from the light source.

[0014] The insertion opening of the housing may be open toward the rear of the vehicle. In this case, a light diffusion film that allows light emitted from the light source consisting of an LED to enter the insertion opening of the housing may be provided to cover the insertion opening. This allows light that is brighter and more uniform across the entire surface of the light diffusion film to enter the display unit, rather than allowing light from the light source to enter the display unit directly.

[0015] The housing may have an adhesive portion on the periphery of the insertion opening to which the light diffusion film is adhered. The housing can be attached to the rearview mirror by adhering the light diffusion film to the vehicle rear surface of the rearview mirror. By bringing the insertion opening side surface of the pressing member into contact with the light diffusion film, the pressing member can press the light diffusion film against the rearview mirror, increasing the adhesive area of ​​the light diffusion film to the rearview mirror and improving adhesion performance.

[0016] An engaging portion that engages with an upper portion of the pressing member may be provided on the inner surface of the housing so as to extend in the longitudinal direction of the vehicle. As a result, when the pressing member is inserted into the housing, it is guided in the longitudinal direction of the vehicle by the engaging portion. After the pressing member is inserted, the engaging portion engages with the upper portion of the pressing member, thereby positioning the pressing member at a predetermined position.

[0017] Furthermore, a protrusion may be provided inside the housing to abut against the circuit board from the side opposite the pressing member. With this configuration, the circuit board can be stably fixed at a desired position inside the housing. [Effects of the Invention]

[0018] As described above, by making it possible to arrange the circuit board on which the light source is mounted along the rearview mirror, the vehicle warning device can be made smaller. [Brief explanation of the drawings]

[0019] [Figure 1] FIG. 1 is a view of a vehicle door mirror unit equipped with a vehicle warning device according to an embodiment of the present invention, as viewed from the rear of the vehicle. [Figure 2] FIG. 2 is an exploded perspective view of the vehicle door mirror unit. [Figure 3] FIG. 3 is a view of a rearview mirror to which a vehicle warning device is attached, as viewed from the front side of the vehicle. [Figure 4] FIG. 4 is a rear view of the warning device for a vehicle. [Figure 5] FIG. 5 is an exploded view of the warning device for a vehicle as seen from the rear side. [Figure 6] FIG. 6 is an exploded view of the warning device for a vehicle as seen from the front side. [Figure 7] FIG. 7 is a front view of the warning device for a vehicle. [Figure 8] FIG. 8 is a cross-sectional view taken along line VIII-VIII in FIG. [Figure 9] FIG. 9 is a cross-sectional view taken along line IX-IX in FIG. [Figure 10] FIG. 10 is a cross-sectional view taken along line XX in FIG. [Figure 11] FIG. 11 is a cross-sectional view taken along line XI-XI in FIG. [Figure 12] FIG. 12 is a bottom view of the warning device for a vehicle. [Figure 13] FIG. 13 is a perspective view of the pressing member. [Figure 14] FIG. 14 is a rear view of the pressing member. DETAILED DESCRIPTION OF THE INVENTION

[0020] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Note that the following description of the preferred embodiments is merely exemplary in nature and is not intended to limit the present invention, its applications, or its uses.

[0021] FIG. 1 is a view of a vehicle door mirror unit 100 equipped with a vehicle warning device 1 according to an embodiment of the present invention, viewed from the rear of the vehicle. The vehicle door mirror unit 100 is a so-called side mirror unit (not shown), which is attached to the front end of a door disposed on the side of an automobile and is used primarily for rearward visibility. In this embodiment, the vehicle door mirror unit 100 installed on the right side of the vehicle will be described. However, the vehicle door mirror unit installed on the left side (not shown) will not be described because it has a symmetrical structure with the right side. In the description of this embodiment, the front side of the vehicle will be simply referred to as the "front," the rear side of the vehicle will be simply referred to as the "rear," the left side in the vehicle width direction will be simply referred to as the "left," and the right side in the vehicle width direction will be simply referred to as the "right." The mirror unit may also be attached to a portion of the vehicle other than the door.

[0022] 2, in addition to the vehicle warning device 1, the vehicle door mirror unit 100 includes a rearview mirror 102, a visor 103 that holds the rearview mirror 102, a mirror base 104 for attaching the visor 103 to the door, and a storage device 105. The rearview mirror 102 is elongated in the left-right direction. A mirror holder 102a is fixed to the back surface of the rearview mirror 102.

[0023] The visor 103 has a recess 103a that is open to the rear. An angle adjustment unit 103b is provided inside the recess 103a of the visor 103. This angle adjustment unit 103b is fixed to the visor 103. The structure of the angle adjustment unit 103b is conventionally well known and will not be described in detail, but it has a built-in motor, reduction gears, etc., and is configured so that the angle of the rearview mirror 102 can be adjusted by tilting the mirror holder 102a, i.e., the rearview mirror 102. The rearview mirror 102 can be tilted about an axis extending in the left-right direction and about an axis extending in the up-down direction.

[0024] An upper panel 103c and a lower panel 103d are provided on the front side of the visor 103. The upper panel 103c and the lower panel 103d are cover members that cover the visor 103 from the front side.

[0025] The storage device 105 is used to switch the visor 103 between an in-use state (shown in FIG. 1) and a storage state (not shown), and this storage device 105 is also conventionally well known. That is, the storage device 105 includes a shaft 105a extending in the vertical direction and a casing 105b that houses the shaft 105a. The casing 105b is provided with a fixing portion 105c that protrudes to the right and is fixed to the visor 103. When this fixing portion 105c is fixed to the visor 103, the casing 105b is integrated with the visor 103, and the visor 103 can be rotated together with the casing 105b around the shaft 105a around the shaft 105a. The storage state is when the visor 103 has been rotated around the shaft 105a until its longitudinal direction is aligned with the front-to-rear direction. The storage device 105 may be an electric storage device incorporating a motor, reduction gears, etc., or may be a manual storage device.

[0026] The mirror base 104 is covered with a cover 106. The mirror base 104 is an integrally molded product made of, for example, a hard resin material. A shaft fixing portion 141 to which the shaft 105a of the storage device 105 is fixed is provided on the upper part of the mirror base 104. The lower end of the shaft 105a of the storage device 105 is arranged and fixed above the shaft fixing portion 141.

[0027] A display unit 102b is provided in a partial area of ​​the rearview mirror 102. The display unit 102b transmits light emitted from a light source 2 (shown in FIG. 4, etc.) described below from the front to the rear of the rearview mirror 102 to display a predetermined message to the driver, and is one component of the vehicle warning device 1. The display unit 102b can be formed, for example, by forming a film forming a half mirror in a partial area of ​​the rearview mirror 102, and can be used as a mirror when no display is being performed. When light from the light source 2 is emitted from the front toward the display unit 102b, the light passes through the display unit 102b, and the driver sees the display unit 102b as glowing.

[0028] The display unit 102b is provided on the outer side of the rearview mirror 102 in the vehicle width direction, and in this embodiment, is located near the right end of the rearview mirror 102. The display unit 102b may be provided in the upper or lower part of the rearview mirror 102. An example of the shape of the display unit 102b is a triangle, but is not limited to this and may be, for example, a stylized car design, a symbol, various marks, letters, or a combination thereof. In this embodiment, the display by the display unit 102b includes a warning display, a caution display, and the like. As such, the vehicle warning device 1 can display a variety of displays, so it can also be called a vehicle display device.

[0029] The vehicle warning device 1 is incorporated into a vehicle door mirror unit 100. Specifically, as shown in Fig. 2, the vehicle warning device 1 is provided in front of a rearview mirror 102 and is housed inside a visor 103 on the right side (a portion closer to the outer side in the vehicle width direction). Therefore, the vehicle warning device 1 does not obstruct rearward visibility.

[0030] In this embodiment, the vehicle warning device 1 is a device for blind spot monitoring (hereinafter referred to as BSM). BSM is for warning or alerting the driver that a following vehicle (car, motorcycle, etc.) traveling in a lane adjacent to the lane in which the vehicle is traveling is approaching the vehicle. An example of the configuration of a blind spot monitoring system, although not shown, includes a sensor (detection unit) for detecting other vehicles provided, for example, on the rear bumper, and the vehicle warning device 1. The sensor is configured to be able to detect the distance between the following vehicle and the vehicle, and such sensors are conventionally well known.

[0031] The vehicle warning device 1 lights or flashes the display unit 102b in a desired color when a following vehicle is approaching the vehicle. The configuration of the sensor is conventionally well known, so a detailed description will be omitted. The vehicle warning device 1 is provided in the left and right door mirror units 100, and is configured to activate the vehicle warning device 1 on the right side when there is a following vehicle approaching from the right, and to activate the vehicle warning device 1 on the left side when there is a following vehicle approaching from the left. The vehicle warning device 1 can also be configured to emit a warning sound simultaneously with the lighting or flashing of the display unit 102b.

[0032] Fig. 4 is a view of the vehicle warning device 1 as seen from the rear, and in this position, the vehicle warning device 1 is attached to the front surface of the rearview mirror 102. As shown in Figs. 5 and 6, the vehicle warning device 1 includes a light source 2 provided in front of the rearview mirror 102, a circuit board 3, a connector 4, a housing 5, a retaining member 6, and a light diffusion film 7. A control circuit (not shown) for controlling the light source 2 may be mounted on the circuit board 3. The power source is an on-board battery.

[0033] The circuit board 3 is a component provided in front of the rearview mirror 102, and is housed in the housing 5 in a position extending in the vertical and horizontal directions. Since the rearview mirror 102 in use extends in the vertical and horizontal directions, the extension direction of the rearview mirror 102 coincides with the extension direction of the circuit board 3. The vertical dimension of the circuit board 3 is set longer than the horizontal dimension. Therefore, the circuit board 3 has a vertically long shape.

[0034] The upper portion of the circuit board 3 has a notch cut out on the right side. As a result, the dimension of the right edge of the circuit board 3 is shorter than the dimension of the left edge. A right recess 3a is formed in the middle in the vertical direction on the right edge of the circuit board 3. An upper left recess 3b is formed on the upper part of the left edge of the circuit board 3, and a lower left recess 3c is formed on the lower part of the left edge of the circuit board 3.

[0035] The light source 2 is composed of an LED that emits light when supplied with power. The color of the light emitted by the LED is not particularly limited, but examples include red and amber. The light source 2 is mounted on the upper portion of the rear surface of the circuit board 3. The upper portion of the circuit board 3 is located above the center in the vertical direction. The height of the upper portion of the circuit board 3 is approximately the same as the height of the display unit 102b. As a result, light is emitted from the upper portion of the circuit board 3 toward the display unit 102b.

[0036] The connector 4 is a member that receives power supplied to the light source 2, and is configured to be connectable to a harness (not shown) extending from a control device (not shown) mounted on the vehicle body. For example, if the connector 4 is a female connector, a male connector is provided at the tip of the harness, and the harness can be connected to the circuit board 3 by inserting the male connector into the female connector.

[0037] The connector 4 is mounted on a lower portion of the front surface of the circuit board 3. The lower portion of the circuit board 3 is a portion located below the center in the up-down direction. Therefore, the light source 2 and the connector 4 are arranged on opposite sides of each other in the up-down direction, and are spaced apart in the up-down direction. Furthermore, the light source 2 and the connector 4 are arranged on opposite sides of each other in the front-to-back direction (thickness direction) of the circuit board 3, and are also spaced apart in the front-to-back direction.

[0038] The housing 5 is made of, for example, a resin material and has a shape that allows the circuit board 3 to be housed in a position that is aligned with the rearview mirror 102. Specifically, the housing 5 is set so that the vertical dimension is longer than the horizontal dimension, and has an insertion opening 5a on the rear side through which the circuit board 3 is inserted. The insertion opening 5a has a shape that is larger than the outer shape of the circuit board 3 and opens toward the rear. The vertical dimension of the insertion opening 5a is set so that it is longer than the horizontal dimension.

[0039] The housing 5 has an upper wall 51 extending in the left-right direction, left and right wall 52 and 53 extending in the up-down direction, a lower wall 54 extending in the left-right direction, and a front wall 55. The upper wall 51, left wall 52, right wall 53, lower wall 54, and front wall 55 are integrally molded. The right portion of the upper wall 51 is inclined downward toward the right end to correspond to the cutout shape of the circuit board 3. The left wall 52 and right wall 53 are approximately parallel to each other. The rear edge of the upper wall 51, the rear edge of the left wall 52, the rear edge of the right wall 53, and the rear edge of the lower wall 54 form an insertion opening 5a. The front wall 55 extends in the up-down and left-right directions and is continuous with the front edge of the upper wall 51, the front edge of the left wall 52, the front edge of the right wall 53, and the front edge of the lower wall 54.

[0040] 7 and 8, a bulging portion 55a that bulges forward is formed in the lower portion of the front wall 55. This bulging portion 55a is located at the same height as the connector 4 housed in the housing 5. The connector 4 housed in the housing 5 is disposed inside the bulging portion 55a. That is, since the connector 4 is mounted on the front surface of the circuit board 3, the connector 4 protrudes forward from the circuit board 3. However, in this embodiment, by forming the bulging portion 55a in the front wall 55 of the housing 5, the front wall 55 as a whole is disposed rearward, thereby making the housing 5 more compact and enabling the connector 4 to be housed therein.

[0041] An opening 55b is formed at the lower end of the bulge 55a. The connection portion of the connector 4 faces downward. As shown in FIG. 12, the connection portion of the connector 4 faces the outside of the housing 5 through the opening 55b. This allows the connector of the harness to be inserted into the connector 4 from below through the opening 55b. The connection portion of the connector 4 may face left or right, or may face upward. The opening 55b may be formed according to the orientation of the connection portion of the connector 4.

[0042] 4 and 5, an upper left protrusion 52a and a lower left protrusion 52b that protrude to the right are provided on the inner surface of the left wall 52 of the housing 5. The upper left protrusion 52a and the lower left protrusion 52b are parallel to each other and extend in the front-to-rear direction from the rear edge of the left wall 52 to reach the inner surface of the front wall 55. In addition, a right protrusion 53a that protrudes to the left is provided on the inner surface of the right wall 53 of the housing 5 and extends in the front-to-rear direction from the rear edge of the right wall 53 to reach the inner surface of the front wall 55. The lower left protrusion 52b and the right protrusion 53a are disposed at the same height.

[0043] When the circuit board 3 is inserted into the housing 5 through the insertion opening 5a, the right protrusion 53a fits into the right recess 3a of the circuit board 3, and the upper left protrusion 52a and the lower left protrusion 52b fit into the upper left recess 3b and the lower left recess 3c of the circuit board 3, respectively. This allows the circuit board 3 to be guided in the insertion direction into the housing 5.

[0044] 8 and 9, convex portions 55c that protrude rearward are provided on the inner surface of the front wall portion 55 of the housing 5 on the top, bottom, left, and right sides. The convex portions 55c are arranged so as to abut against the front surface of the circuit board 3. When a part of the circuit board 3 abuts against the convex portions 55c, the circuit board 3 is positioned in the front-to-rear direction relative to the housing 5. The shape and number of the convex portions 55c can be set as desired.

[0045] 5, claw portions 54a protruding upward are provided on both the left and right sides of the inner surface of the bottom wall portion 54 of the housing 5. Positioning portions 54b protruding upward are provided between the left and right claw portions 54a on the inner surface of the bottom wall portion 54 of the housing 5. The protruding height of the positioning portions 54b is set lower than the protruding height of the claw portions 54a.

[0046] As shown in FIGS. 8 to 11 , the retaining member 6 is a member for retaining the circuit board 3 in the thickness direction from the insertion opening 5a side, and is provided inside the housing 5 after being inserted into the housing 5 through the insertion opening 5a. The retaining member 6 is made of a hard resin material, similar to the housing 5. As shown in FIGS. 13 and 14 , the retaining member 6 has a horizontally elongated shape in which the left-right dimension is longer than the up-down dimension. Recesses 6a are formed on both the left and right sides of the upper portion of the retaining member 6. When the retaining member 6 is inserted into the housing 5, the lower left protrusion 52b fits into the left recess 6a, and the right protrusion 53a fits into the right recess 6a. This allows the retaining member 6 to be guided in the front-rear direction by the lower left protrusion 52b and the right protrusion 53a when inserted into the housing 5. In other words, the portion that guides the circuit board 3 in the front-rear direction and the portion that guides the retaining member 6 in the front-rear direction are the same.

[0047] When the pressing member 6 is housed in the housing 5, the lower left protrusion 52b and the right protrusion 53a are disposed in the recess 6a of the pressing member 6 and engage with the upper portion of the pressing member 6 from above. The engagement of the lower left protrusion 52b and the right protrusion 53a with the pressing member 6 prevents the pressing member 6 from being displaced upward. The lower left protrusion 52b and the right protrusion 53a are parts that correspond to the engaging parts of the present invention.

[0048] The underside of the pressing member 6 has locking portions 6b formed on both the left and right sides so as to protrude downward. As shown in Fig. 10, when the pressing member 6 is housed in the housing 5, the left locking portion 6b locks onto the left claw portion 54a from the front, and the right locking portion 6b locks onto the right claw portion 54a from the front. This prevents the pressing member 6 from coming off the housing 5. With the locking portions 6b locked onto the claw portions 54a, the upper portion of the pressing member 6 abuts against the lower left protrusion portion 52b and the right protrusion portion 53a.

[0049] An intermediate protrusion 6c is formed on the underside of the pressing member 6 between the left and right locking portions 6b so as to protrude downward. As shown in Fig. 8, when the pressing member 6 is housed in the housing 5, the intermediate protrusion 6c abuts against the positioning portion 54b from above. The abutment of the intermediate protrusion 6c against the positioning portion 54b restricts downward displacement of the pressing member 6.

[0050] The pressing member 6 is housed in the lower portion of the housing 5. As shown in FIGS. 8 to 11, the front surface of the pressing member 6 is a contact surface 6d that contacts the rear surface of the circuit board 3. Therefore, the pressing member 6 is disposed so as to press down on the lower portion of the rear surface of the circuit board 3.

[0051] The position of the abutment surface 6d in the front-rear direction is set so that, when the locking portion 6b is locked with the claw portion 54a, a predetermined pressing force acts on the rear surface of the circuit board 3. By setting the position of the abutment surface 6d in the front-rear direction in this way, rattle of the circuit board 3 can be suppressed and the circuit board 3 can be held in a predetermined position.

[0052] 13 and 14, the pressing member 6 is provided with a lightening portion 6e that is elongated in the left-right direction. The lightening portion 6e is provided on each of the left and right portions of the pressing member 6 and is hollow. The lightening portion 6e opens on the front surface of the pressing member 6. The lightening portion 6e may be provided as needed, or may be omitted.

[0053] The light diffusion film 7 is a light diffusion member that receives light emitted from the light source 2, diffuses the incident light, and then emits the light. Such films having light diffusion properties are well known. As shown in FIGS. 8 and 9, the light diffusion film 7 is provided to cover the insertion opening 5a of the housing 5. That is, as shown in FIG. 5, a plate-shaped portion (adhesive portion) 5b to which the light diffusion film 7 is adhered is provided at the peripheral edge of the insertion opening 5a of the housing 5, extending radially outward from the insertion opening 5a and continuing in the circumferential direction of the insertion opening 5a. The rear surface of the plate-shaped portion 5b is formed to fit the rearview mirror 102. The outer shape of the light diffusion film 7 is formed to correspond to the outer shape of the plate-shaped portion 5b. The outer periphery of the light diffusion film 7 is attached to the rear surface of the plate-shaped portion 5b with a pressure-sensitive adhesive, adhesive, or the like.

[0054] The front portion of the light diffusion film 7 is composed of a light-shielding layer 7a having light-shielding properties. A diffusion layer 7b having light-diffusing properties is provided behind the light-shielding layer 7a. A light-transmitting opening 7c having a shape similar to that of the display unit 102b is formed in the light-shielding layer 7a. Light emitted from the light source 2 passes through the light-transmitting opening 7c and enters the diffusion layer 7b, and is then diffused by the diffusion layer 7b, allowing light that is high in brightness and uniform throughout the entire surface to be incident on the entire display unit 102b.

[0055] The rear surface of the light diffusion film 7 is adhered to the front surface of the rearview mirror 102 with a pressure-sensitive adhesive, adhesive, or the like. The surface 6f (rear surface) of the pressing member 6 on the insertion opening 5a side is disposed so as to contact the front surface of the light diffusion film 7. By bringing the rear surface 6f of the pressing member 6 into contact with the front surface of the light diffusion film 7, the pressing member 6 can press the light diffusion film 7 against the rearview mirror 102. This increases the adhesion area of ​​the light diffusion film 7 to the rearview mirror 102, improving adhesion performance.

[0056] (Effects of the embodiment) As described above, in this embodiment, the circuit board 3 on which the light source 2 is mounted is housed in the housing 5 in a position aligned with the rearview mirror 102, and inside the housing 5, the circuit board 3 can be held down in the thickness direction from the insertion opening 5a side by the holding member 6.

[0057] As a result, the circuit board 3 on which the light source 2 is mounted is housed in the housing 5 in a position that is aligned with the rearview mirror 102, and the circuit board 3 does not protrude from the rear of the rearview mirror 102. This allows the housing 5 to be made thinner in the front-to-rear direction, and as a result, the vehicle warning device 1 can be made more compact. Furthermore, the circuit board 3 is stably held inside the housing 5 while being pressed in the thickness direction by the pressing member 6, and therefore, displacement of the light source 2 is less likely to occur even without fastening the circuit board 3 to the housing 5 using fastening members such as screws. In other words, in this embodiment, no fastening member is required for fastening the circuit board 3. Note that a fastening member for fastening the circuit board 3 may be used.

[0058] Furthermore, because the connector 4 is located on the opposite side of the pressing member 6, the connector 4 does not get in the way when the pressing member 6 presses down on the circuit board 3. Furthermore, because the light source 2 is mounted on the upper portion of the circuit board 3 and the pressing member 6 presses down on the lower portion of the circuit board 3, the pressing member 6 does not block the light emitted from the light source 2. Furthermore, because the pressing member 6 is engaged with the claw portion 54a of the housing 5, rattling of the pressing member 6 is also suppressed.

[0059] The above-described embodiment is merely illustrative in all respects and should not be construed as limiting. Furthermore, all modifications and variations within the scope of the claims are within the scope of the present invention. For example, the light source 2 may be configured with a light emitter other than an LED. [Industrial Applicability]

[0060] As described above, the vehicle warning device according to the present disclosure can be used, for example, as a display device for a blind spot monitoring system. [Explanation of symbols]

[0061] 1. Vehicle warning devices 2 light source 3 Circuit Board 4 Connectors 5. Cabinet 5a Insertion port 5b Plate-shaped part (adhesion part) 6. Retaining member 7. Light diffusion film 52b Lower left protrusion (engaging part) 53a Right protrusion (engaging part) 100 Door mirror unit for vehicle 102 Rearview mirror 102b Display section

Claims

1. A vehicle warning device that is incorporated into a mirror unit that has a rearview mirror extending in a vertical direction and a vehicle width direction and is attached to a vehicle, a circuit board on which a light source is mounted, the light source being provided on the vehicle front side of the rearview mirror and configured to emit light when supplied with power; a housing having an insertion opening for inserting the circuit board, the housing accommodating the circuit board inserted through the insertion opening in a position aligned with the rearview mirror; a pressing member provided inside the housing and configured to press the circuit board in a thickness direction from the insertion opening side; a display unit that is provided in a partial area of ​​the rearview mirror that is arranged on the vehicle rear side of the light source and that transmits light emitted from the light source to the rear side of the vehicle to display a predetermined display.

2. 2. The vehicle warning device according to claim 1, The circuit board is housed in the housing in a position extending in the vertical direction, the light source is mounted to an upper portion of the circuit board; A connector to which a harness is connected is mounted on a lower portion of the circuit board, The pressing member is arranged to press a lower portion of the circuit board.

3. 3. The vehicle warning device according to claim 2, the light source is mounted on a vehicle rear surface of the circuit board, the connector is mounted on a surface of the circuit board facing the front of the vehicle, The pressing member is disposed so as to press a surface of the circuit board on a rear side of the vehicle.

4. 2. The vehicle warning device according to claim 1, The insertion opening of the housing is open toward the rear of the vehicle, The warning device for a vehicle further comprises a light diffusion film that allows light emitted from the light source, which is an LED, to enter the insertion opening of the housing, the light diffusion film being provided so as to cover the insertion opening.

5. 5. The vehicle warning device according to claim 4, an adhesive portion to which the light diffusion film is adhered is provided on a peripheral edge portion of the insertion opening in the housing; the light diffusion film is adhered to a surface of the rearview mirror on the vehicle rear side, The surface of the pressing member on the insertion opening side is arranged to be in contact with the light diffusion film.

6. 3. The vehicle warning device according to claim 2, An engaging portion that engages with an upper portion of the pressing member is provided on an inner surface of the housing so as to extend in the front-rear direction of the vehicle.

7. 2. The vehicle warning device according to claim 1, The warning device for a vehicle has a protrusion provided inside the housing that abuts against the circuit board from the side opposite the pressing member.

Images